Final answer:
Smell relies on chemoreceptors to detect odors, whereas touch and balance use mechanoreceptors. Sight also involves mechanoreception in lens adjustment and signal transduction. (Option A and C)
Step-by-step explanation:
The question is about determining which of the listed options does not use mechanoreceptors for perception. Smell does not rely on mechanoreceptors; instead, it employs chemoreceptors, which respond to chemical stimuli like odor molecules.
On the other hand, touch, balance (or equilibrium), and sight are sensed through mechanoreceptors. For example, the vestibular system uses hair cells sensitive to changes in head position to provide a sense of balance, while touch encompasses various mechanoreceptors that respond to pressure, vibration, and other tactile stimuli. Although sight is primarily light-based, it does involve mechanotransduction in the process of focusing the lens and converting light into signals.